// You're given strings J representing the types of stones that are jewels, and S representing the stones you have.  Each character in S is a type of stone you have.  You want to know how many of the stones you have are also jewels.
//
// The letters in J are guaranteed distinct, and all characters in J and S are letters. Letters are case sensitive, so "a" is considered a different type of stone from "A".
//
// Example 1:
//
//
// Input: J = "aA", S = "aAAbbbb"
// Output: 3
//
//
// Example 2:
//
//
// Input: J = "z", S = "ZZ"
// Output: 0
//
//
// Note:
//
//
// 	S and J will consist of letters and have length at most 50.
// 	The characters in J are distinct.
//
//


/**
 * @param {string} J
 * @param {string} S
 * @return {number}
 */
var numJewelsInStones = function(J, S) {
    var tmp=J.split("");
    var count=0;
    
    for (var i=0;i<tmp.length;i++){
        if(S.indexOf(J[i])==-1){
            continue;
        }
        var Reg=new RegExp(tmp[i],'g');
        count+=S.match(Reg).length;
    }
    return count;
    

    
};
